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Anesthetic

Anesthetic drug is given by s/c injection into skin
Anesthetize small area of skin and adjacent tissue
Used during minor surgical procedures (biopsy)

Regional anesthesia

Anesthetic drug is given s/c injection near a nerve plexus (group of nerves) and its branches
Used during surgery on an extremity
Provides anesthesia for just that region
Also known as nerve block anesthesia

Spinal Anesthesia

Anesthetic drug is given by injection into the subarachnoid space between the vertebrae of the lumbar region of the back

Epidural anesthesia

Anesthetic drug is given by injection into the epidural space; then moves into the subarachnoid space to produce anesthesia